Strainer and valve box for pumps or the like.



DE WANE B'. SMITH.

I STRAINER AND VALVE BOX FUR PUMPS OR THE LIKE.

APPLICATION FILED Noy. i. 1912.

1,297,603. Pateflted Mar. 18,1919.

: INVENTOR v MQ M ATTORNEY the like;

numerals marked thereon,

. and force pumps such as are n1: wanna. smrn, or UTICA, NEW YORK.

STRAINEB AN ID VAIVE BOX FOR PUMPS OR THE LIKE.

To all whom it may concern:

'Beit known that I, DE WANn B. SMI'rrI, a citizen of'the United States, and a resident of Utica, N. Y., in the county of Oneida and State of New York, have invented certain new and useful Improvements 1n Strainer and Valve Boxes for Pumps or and I do hereby declare that the clear, and exact descripenable others skilled ertains to make and i eing had to the acfollowing is a full, tion thereof, which will in the art to which'it ap use the same, reference companying drawings,

of this specification.

My present invention relates to Sprayers especially ada ted for use as a foot-held hand-operated buc et pump'or sprayer.

The purpose of my invention is to provide an improved article of the class described which is simple and economical in construction and durable in use.

A further purpose is to provide a force pump or sprayer that is especially adapted or omestic and a cultural purposes, 1n that the device is 0 such construction that it is ready for instant use and may be kept in workable condition with the minimum of care.

A still further object of my invention is to provide an article of thev class described of which the character, construction and combination is such that the device may be manufactured or constructed from'standard material with the use of very little expert labor and with a minimum of special parts. My invention further resides in the particular construction of the parts of the device and the arrangement and combination thereof as hereinafter set forth.

Further purposes and objects of my invention will appear from the specification and claims herein.

Figure 1. is a perspective view of a sprayer or force pump embodying my invention.

Fig. 2 is a longitudinal sectional view on an enlar ed scale of the device shown in 1, wlth the central part of the cyllnder and air chamber and contained parts cut away in. order to showthe material parts upon a larger scale.

Specification of Letters Patent.

and to the reference which form part the plug v Patented Mar. 18, 1919.

Application filed ltovember 7,1917. Serial K0. 200,652.

Referring tothe drawings in a more particular description, it will be seen that the force pump or sprayer therein shown comprises a pump cylinder 3 and an air chamber 4 both relatively lon and conveniently constructed of thin eet metal or tubing. Preferably the air chamber 4 is shorter and ofsmaller cross area than the ump cylinder 3. Preferably also the air chamber will be secured to one side of the cylinder intermediate its ends that is, with the cylinder extending both a veand below the top and bottom of the air chamber.

Reciprocatingly mounted in the pump cylinder 3 there is providedthe piston 5 secured to the lower end of a piston rod 6 which projects upward from the piston through the cylinder and .beyond the upper end of the cylinder. To the upper end, of

the piston rod 6- is fastened the handle 7 whereby the device is operated. A wooden plug 8 is inserted in the upper end of the cylinder 3 to form a plug to close said upper end of the cylinder and to guide-the upper end of the piston rod 6.. A centrally arranged aperture 9 is provided in the plug 8 to permit the passage of the piston rod through the upper end of the cylinder. The aperture 9 is of such diameter as to fit the piston rod 6 close enough to prevent liquid from following the piston rod up through the plug, but is large enoughto allow free movement of the piston rod through said plug. The advantage of the Wooden plug is that it provides an ample guide for the piston rodthat will not wear against the piston rod and that will be substantially Without noise when the pump is being operated. The plug 8 is removably held in place by means of screws 10 fas-. tened through holes near the upper end of the cylinder into the plug. A metal top cap 11 may be provided to cover the top of 8 and that portion of its sides that are above the cylinder. A central opening 12. will be provided in this top cap c0rre spending in location with the plug aperture 9, but a trifle larger. A collar or other enlargement 13 is provided upon the piston rod 6 a, such a point upon the downward movement of the piston rodvbelittle'below the handle 7 and at piston rod as to stop "fore the piston 5 reaches the bottom of the screw threaded on to the extension 22 is the cylinder. This sto prevents the from damagingthe strainer 14 provided 1n the lower part of the cylinder and also prevents the piston from being injured by contact with said strainer. This sto sures sufiicient space below the ownward position of the handle 7 and the to of the pump to prevent the operators an being pinched at the end of the downward stroke. A similar collar or other enlargemeat 15 is provided'uponthe piston rodf'6 a little ways above the piston 5. This collar acts as a stop to prevent the operator drawing the piston too far up and to prevent contact of the piston with the plug 8. Preferably the stop 15 will be located about two .inches above the piston 5, therebykeeping the piston two inches or more from the upper end of the cylinder even at the upward end of its stroke. In this way the device is protected from undue side strain and the piston rod is revented from being cramped sidewise as t e operator starts the downward stroke.

The piston 5 may be convenientl constructed of two oppositely cup ed. eather .washers 16 and 17 held in exten ed position between two. slightly smaller and similarly cupped metal disks 18 and 19. The piston is conveniently and removably mounted upon also inthe end of the piston rod by bein held be-..

tween an upper nut 20 first place upon the piston rod and a lower nut 21 placed upon.

the'piston rod after the washers and cupped I plates have been placed in position upon the piston rod.

To the bottom of the cylinder 3 is aflixed a short extension 22 having a coarse screw thread upon its side and havmg a narrow inturned flange 23 at its bottom. Removably bottom cap .24, which has interior screw threading at its upper end to fit thescrew threadin of extension 22. Near the bottom- 24 there are provided" of said' ottom ca apertures 25 for t e entrance of the water I or other fluidto be pumpedor sprayed by thev device. Spaced from the in-turned flange 23 of the-extension 22 there is provided upon the bottom cap 24 an inwardly the lower end of the adjacent air chamber 4. A short distance above the bottom end 31 of the air chamber 4 is atfixed a metal plate 32 "which serves as the valve seat of a check valve the other member of which is a loose ball 33 seating into the central apertureof the plate 32.

U The outlet pipe 34 extends from a short distance above the top 35 of the air chamber down through said air chamber top 35 and then down longitudinall: through said air chamber to a point slig tly above the top of the ball 33 when said ball is in seated position. To the lower end of the outlet pipe 34 is affixed a plate 36 centrally apertured to correspond with the openin'g of pipe 34. Ample passage is afi'ordedpast plate 36 by means of said plate either being spaced from the sides of the chamber or by being provided with notches or perforations in said plate'whereby the water or other liquid may rise past the lower end of said outlet pipe.

Preferably also one or more openings 38 are provided in the sides of said pipe 34 near its lower end but above the plate 36. The plate 36 operates to maintain the outlet pipe 34 in the desired position in the airchamber 4 and thus .prevents straining the jolnt' made 'where the outlet pipe passes through the upper end 35 ofthe air chamber.

The plate 36 also limits the upward movement of the valve ball 33 and prevents its being caught between the lower end of outlet pipe 34 and the adjacent walls of the air chamber. 4. The upper or exterior and of the outlet 34 is provided with an enlargement or shoulder 39 whereby a piece of hose 40-may be readily and securely but removably attached'to the sprayer .or pump.

A supporting bracket 41 has its upper end A I rigidly attached to the device as by being fastened to the side of the cylinder 3 and with the supportin preferably reinforced by a band 42 partly encircling said cylinder. From such point of attachment to the device the supporting bracket 41 extends out a short distance from the device and then longitudinally thereof to a point beyond thelower end of the pump.

At its lowerendthe bracket 41 is preferably extended outwardly at right angles. Such extension has fastened thereto a wider foot piece 43.-

The pump or sprayer is placed in position for operation by placing the lower end of the pump'into a bucket or pail (not shown) bracket of the device outside the pail an with the foot piece 43 upon the ground or floor upon which rests the bucket. The operator then holds the sprayer in this position-by simply placing one foot over-the foot piece 43.

The pump is operated by the operator grasping the handle. 7 with one hand and working said handle up and down while with the other hand the operator may if desired hold the hose 42 or nozzle thereof and so irect the spray or stream from the pump r sprayer. It will be seen that upward movement'of e piston will close the check valve in the @ir chamber, preventing the return of the iquid that has passed said check valve and ill open the check valve in the bottoi he pump cylinder, whereupon the liquid ipon the liquid therebelow and cause the heck valve at the bottom of the pump cylinler to close and will force the liquid out from the pump cylinder through the port into LllG part of the air chamber below the plate 32, whereupon the valve ball 33 will be raised md the liquid will be forced into the air :hamber 4. Some of the liquid so entering will be forced directly out through the outet pipe 34 and the balance of the liquid will e forced upward in the air chamber past the ower end of the outlet pipe 34 and well up nto the upper part of the air chamber 4. lhis accumulation of liquid in an obvious nanner compresses the air present there- IDOVC, in the air chamber, resulting in said luid being expelled from the air chamber ind through the outlet pipe 34 while the pison is taking its next upward stroke and vhile the valve ball 33 is closed therefor.

It will be seen that I have produced a form f force pump or sprayer that is very simple n construction and operation, and so adaptd to be operated, cleaned or repaired by vnyone usually required to handle such deioes. It will be seen also that the general onstruction is of such character that very cw special parts are used or parts that reuire complicated machinery for their contruction.

It will be especially noted that the bottom ap 2* is adapted to be readily removed by cing unscrewe from the extension 22. .hereupon access is had to the bottom end of he cylinder and to the lower side of the trainer 14, whereby those parts may be cadily cleaned. At the same time the disk 7 and the rubber or leather washer 28 there- .bove may be readily removed from their ,osition in the bottom cap for cleaning or enewal and access thus had to the insi e of he bottom part of said cap. This is an special advantage in force pumps used for lomcstic or agricultural purposes and for prayers, in that the solid matter or sediment hat sometimes accumulates may be cleaned may from the parts of the pump and the amp rendered fit for further use or left lean to put away.

By removin the screws'lO that extend ,hrough the cy inder into the wooden plug 8 from the and then removing the plug from the end of the cylinder, the piston 6 is readily removed from the cylinder. By removing the lower nut 21 of the piston the lower cupped disk 19 may be removed and then the twoleather washers 16 and 17 can be readily removed iston rod for cleaning, repair or renewal. hese parts may then be replaced into ro r position in an obvious manner.

at claim as new and desire to scour by Letters Patent is:

1. A. removable strainer and valve box for the inlet of a pump or the like comprising an inlet extension on the pump, a cap detachably secured at its inner end onto said inlet extension and provided therebeyond with inlet ports, an inwardly extending shoulder within said cap intermediate its ends, a valve seat member located and held in place between the bottom of the pump extension and the shoulder of the said cap and a check valve member seating upon said valve seat member whereby the valve seat and valve member may be removed upon the removal of said cap.

2. A removable strainer and valve box for the inlet of a pump or the like comprising an inlet extension on the pum a cap detachably secured at its inner end onto said inlet extension and provided therebeyond with inlet ports, an inwardly extending shoulder within said cap intermediate its ends, a valve seat member located and held in place between the bottom of the pump extension and the shoulder of the said cap, a check valve member seating upon said valve seat member and a strainer above the raised position of said movable valve member whereby the valve seat and valve member may be removed and access had to said strainer upon the removal of said cap.

5. A removable strainer and valve box for the inlet of a pum or the like comprising an exiernally-screwlireaded inlet extension on the pump, a cap screw-threaded at its inner end onto said inlet extension and provided therebeyond with inlet ports, an inwardly extendin shoulder within said cap intermediate its ends, a valve seat member located and held in place between the bottom of the pump extension and the shoulder of said cap and a. check valve member seating upon said valve mat member.

4. A removable strainer and valve box for the inlet of a pum or the like comprising an externally-screw-t readed inlet extension on the pump provided at its inn end with an inwardly extending flange, a cap screw threaded at its inner end onto said inlet extension and provided therebeyond with inlet ports, an inwardly extending shoulder within said cap intermediate its ends, a val e seat member located and held in place between the inwardly extending flange at the bottom of said extension and the shoulder of said cap and a check valve member seating upon said valve'sea't'member.

5. A removable strainer box for the inlet of a pump or the like comprising an externally-screw-threaded inlet extension on the pump, a strainer near the inner end of said extension and a cap screw-threaded at its inner end onto said inletextension and provided therebeyond with lateral ports and an- 10 imperforate bottom forming a rest for the pump.

In witness whereof I have afiixecl my signature, this 16th day of October, 1917 DE WANE B. SMITH. 

